<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 2.为 ECharts 准备一个定义了宽高的 DOM -->
      <div id="main" style="width: 1000px; height: 400px"></div>
    </el-card>
  </div>
</template>

<script>
// 1.导入echart
import * as echarts from "echarts";
import _ from 'lodash';
export default {
  name: "Report",
  data() {
    return {
      options: {
          title: {
            text: '用户来源'
          },
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'cross',
              label: {
                backgroundColor: '#E9EEF3'
              }
            }
          },
          grid: {
            left: '3%',
            right: '4%',
            bottom: '3%',
            containLabel: true
          },
          xAxis: [
            {
              boundaryGap: false
            }
          ],
          yAxis: [
            {
              type: 'value'
            }
          ]
        }
    };
  },
  created() {},
  //此时，页面上的元素已经渲染完了
  async mounted() {
    // 3.基于准备好的dom，初始化echarts实例
    let myChart = echarts.init(document.getElementById("main"));

    const {data:res} = await this.$http.get('reports/type/1');
    if(res.meta.status !== 200) {
      return this.$message.error('获取折线图数据失败!');
    }

    const result = _.merge(res.data,this.options);

    //4.准备数据和配置项
    myChart.setOption(result);
  },
  methods: {},
};
</script>

<style>
</style>